read line by line from file

Hi , how can i read a file line by line ???
i want to save each line in slot of String array
i write this code but it`s return all of file !!!
please help me to change this code
thanks

import java.io.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class Midlet extends MIDlet implements CommandListener {

private Display display;
    private Form form;
    private Command read, exit;
    private Alert alert;
    private String[] db;
    private int i = 0;

public Midlet() {
        display = Display.getDisplay(this);
        read = new Command("Read", Command.SCREEN, 1);
        exit = new Command("Exit", Command.EXIT, 1);
        form = new Form("Read File");
        form.addCommand(exit);
        form.addCommand(read);
        form.setCommandListener(this);
    }

public void startApp() {
        display.setCurrent(form);
    }

public void pauseApp() {
    }

public void destroyApp(boolean unconditional) {
        notifyDestroyed();
    }

public void commandAction(Command c, Displayable s) {
        String label = c.getLabel();
        if (label.equals("Read")) {
            String stText = readUnicodeFile("test.txt", "UTF-8");
            if (stText != null) {
                alert = new Alert("Reading", stText, null, null);
                alert.setTimeout(Alert.FOREVER);
                display.setCurrent(alert, form);
            }
        } else if (label.equals("Exit")) {
            destroyApp(false);
        }
    }

/* private String file(){
    InputStream is = getClass().getResourceAsStream("test.txt");
    StringBuffer sb = new StringBuffer();
    try{
    int chars, i = 0;
    while ((chars = is.read()) != -1){
    sb.append((char) chars);
    }
    String stText=readUnicodeFile("test.txt","UTF-8");
    return sb.toString();
    }catch (Exception e){}
    return null;
    }*/
    private String readUnicodeFile(String string, String string0) {
        StringBuffer buffer = new StringBuffer();

java.io.InputStream is = null;
        java.io.InputStreamReader isr = null;
        try {
            int ch = 0;
            Class c = this.getClass();
            is = c.getResourceAsStream(string);
            isr = new InputStreamReader(is, string0);

while ((ch = isr.read()) > -1) {
                buffer.append((char) ch);
            }
            isr.close();
            if (is != null) {

is.close();
            }

} catch (Exception ex) {
            ex.printStackTrace();
        }
        return buffer.toString();

}
}

Dear friend

String des=""
Vector vector = new Vector ();

while ((ch = isr.read()) > -1) {
buffer.append( (char) ch ) ;

des+= (String) (char) ch ;
if ( (char) ch == '\n' ) {
vector.addelements(des) ;
des = "" ;

}

}

regards